What to do when a client won't pay an invoice (a 6-step playbook)

An invoice goes unpaid. You sent the email reminder. Then the second email reminder. Now it has been 30 days and the customer has gone quiet. What you do next, and how fast, determines whether you ever see the money.

Step 1: Make the phone call. Not another email. Email is what got ignored. The phone call is where the conversation actually happens. About 85 to 90 percent of overdue invoices in the first three weeks are simply forgotten or waiting on a cash-flow event. A polite, non-threatening call that names the invoice and asks how the customer would like to resolve it converts most of them in under two minutes. If you do not have time or stomach to make the call, the Syntharra AI voice agent does it on day three past due, identifying as AI on the opening line and routing any dispute back to you.

Step 2: Document the contact. Whatever the call surfaces — a payment date, a dispute, a request for a copy of the invoice — write it down with the date and time. If this ever escalates to small claims, contemporaneous notes are the difference between winning and losing the hearing. Email summaries of phone conversations to the customer immediately afterward; a paper trail you can show a judge needs to be in writing.

Step 3: Send a formal demand letter. If the call did not resolve it within the agreed-upon date, send a demand letter by certified mail with return receipt. Reference the invoice number, the original due date, the calls that have happened, and a final payment deadline (usually 14 days). State that failure to pay by that date will result in further action. Keep the tone direct but professional. This letter is what a small-claims judge will read first if you end up in court.

Step 4: Decide on collections agency or small claims. After the demand letter deadline passes, you have a fork. Collections agencies charge 30 to 50 percent of recovered amount, only engage at day 90 or later, and almost always end the customer relationship because federal FDCPA law requires their callers to identify as debt collectors. Small claims court is generally faster and cheaper for amounts under your state's threshold (typically $5,000 to $15,000 — varies by state).

Step 5: File in small claims. Filing fees range from $30 to $200 depending on the state and amount. You will need the original contract or signed estimate, copies of all invoices, the demand letter with return receipt, notes from the calls, and emails. The hearing is typically 4 to 8 weeks after filing. Most cases never go to hearing — the customer pays before the date, or settles before stepping into the courtroom. If you do go to hearing, the judge wants to see the paper trail, not hear emotional arguments.

Step 6: Enforce the judgment. Winning a judgment is not the same as collecting on it. If the customer refuses to pay even after a court order, you may need to file a writ of garnishment against their bank account or wages. Each state has its own enforcement mechanism. Most small-claims judgments do collect because the social pressure of a court order is enough — but for the holdout cases, enforcement is a separate process with its own filing fees.

What to skip: do not attempt to charge fees not in the original contract, do not call before 8 AM or after 9 PM in the customer's timezone (that violates TCPA at the federal level and stricter state laws on top — see /compliance), and do not call on weekends. Do not threaten legal action you don't intend to take; bluffing in writing can be used against you.

What to do if the amount is under $1,000: small claims rarely makes sense for invoices under a thousand dollars by the time you factor filing fees, court time, and enforcement. The Syntharra AI voice agent at ten percent of recovered amount is usually the right tool for small balances — automated, compliant, and pays nothing if it recovers nothing.

What to do if the amount is over $15,000: at that level you are usually past small claims jurisdiction and into a real lawsuit. Hire an attorney before filing. The economics shift; collections agency referral may also make sense at this scale, but only if the customer relationship is already gone.